») 
1872.] 427 [Cope. 
imally some distance beyond the head. The superior plane of this expan- 
sion is continuous with that of the rib, and is flat ; the head of the rib 
therefore turns downwards and inwards from it, to join the vertebra. 
Now the extent of the inner part of the lamina is such that, were the 
head articulated to any of the centra discovered, the former would inter- 
fere or overlap. They may, therefore, have been articulated to diapophy- 
ses. The expansions are serrato-digitate on the margins, and exhibit | 
| radiating grooves and ridges in some places, on the superior aspect. The | 
| lengths of these ribs are not so great as the proportions of some of the ; 
| other bones would indicate. i 
Width at head 
“¢ oa 
M. iy 
{ Length. fGNo. Vda, 6 inches) ssiwe asa ewes weak: 0.510 i , 
! 
es at middle 
he AiWOX UL OMNUY CR s@s -earats Gek a ye eee 040, i 
deengtle ONO ies i ee oe eng kage 890 Hi 
Width tt = just: below. the head... 3. eat. es .100 Hi 
pep gab midlets on Cee ioe. Cee ee 037 | | 
VEteha fend aby Nes Ree ee tegee  r er .880 
<em-proximal to head... sista dla cote dt «cae ake .060 il 
Myddlchy ai mal Glew ss fo ots 8 oo ee a 08 i 
In the rib ‘‘No. II.” the head is turned obliquely to one side, indicating ) 
that the rib diverged at a strong angle from the vertebral column, in fact | 
not more than one of 45°, Thisis then an interior or posterior rib, prob- 
ably the latter, since the shell is usually expanded chiefly in that direction. 
All the ribs are flat above, and convex inferiorly. 
Both sides of the seapular arch are complete, except the sutural portions 
of coracoid and scapula of one side. The scapula and procoracoid make 
a very open angle with each other, both being stout; the scapula the 
longer, with grooved sculpture at its proximal end. The procoracoid is a 
little the shorter. The glenoid cavity and coracoid suture are almost 
sessile at the union of the scapula and procoracoid. The coracoids are 
very elongate, almost equal to the ribs, and not stouter except at the ex- 
tremity. It is expanded into an oblique head proximally ; the shaft is 
flat, one edge thickened or truncated, the other thin. The distal portion 
is scarcely expanded, being more slender than in any recent Testudinate 
known to me. 
M. 
Length scapula ‘to glenoid cavity... 2.262... 0.213 ‘ : 
Width Me PDEOMLINGILY, < See co ee 045 | 
Length procoracoid to articular surface............... 106 t 
Width fs. a doaballpiny cache au Ga eet 060 H 
Henin: COraCOMcd nccch see 2t Soccer e 400 | il 
FN ACG OLE YO ORAM YEH oe hak ae ee nD 086 i 
pe INCOR TIR es Se ee ae eran aren Ce te ae 047 | 
rs distally .080 a i 
' | 
